Improvement in shoe-knives



M. A. TYLER.

Shoe-Knives. I

N0 157,948 Pgtented Dec. 22,1874.

.3. JII7/ Witmewea. I 2 575 JRTMIZZ 9Q- 75 607 THE GRAPH! CO.FNOTO'LITM-lgk 4! PARK PLACE, NY.

MERRILL A. TYLER, OF NEW DURHAM, NEW HAMPSHIRE, ASSIGNOB TO FRANKLIN W.COBURN, OF SAME PLACE.

IMPROVEMENT IN SHOE-KNIVES.

Specification forming part of Letters Patent No. 157,948, dated December22, 1874 application filed October 14, 1874.

To all whom it may concern:

Be it known that I, MERRILL A. TYLER, of New Durham, in the county ofStrafford and State of New Hampshire, have invented certain new anduseful Improvements in Shoe- Knives; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable others skilled in the art to which it pertains to make and usethe same, reference being had to the accompanying drawings and to theletters of reference marked thereon, which form a part of thisspecification.

In said drawing, Figures 1 and 2 are opposite side views of my improvedimplement. Fig. 3 is a side view, showing the guard turned down into aposition to enable the blade or knife to be ground or sharpened. Fig. 4.is a central and longitudinal section taken at right angles to the planeof the blade. Fig. 5 is a front-end view of the implement.

My invention is an improvement on that class of devices employed fortrimming the edges of boots and shoes; and consists in the peculiarconstruction and arrangement of the parts, as hereinafter described andclaimed.

In the drawing, A denotes the handle; B, the blade, and (J the guard. Dis a metallic bolster affixed to the upper end of the handle, and havinga metallic bar or jaw, F, which extends nearly to the bottom of thechamber formed axially in the handle, and has an annular head, a, on itslower end, such head having a hole made centrally through it. G is asemicircular wedge, which is formed with an incline, b, at its upper,and another incline, c, at its lower end, the former acting against theinterior of the bolster, and the latter against the interior of the heada, the object of these two inclines being to clamp the knife, both atthe upper and lower ends of its tang or part within the handle. H is ascrew which passes through a metallic cap, at, disposed on the outer endof the handle, and works in a female screw formed in the lower end ofthe wedge Gr, as shown in Fig. 4. The tang of the knife, being passedthrough the bolster, and between the bar D and the wedge G, may befirmly clamped by simply rotating the screw H in the proper direction.By thus clamping the tang of the blade at the two points, as described,the knife is most effectually secured in position under the great strainoften brought to bear upon it.

The guard O is formed with a projecting lip, e, to extend over the endof the blade, the latter resting in a notch formed therein, by which theblade is preserved from lateral deflection. This guard is hinged orpivoted to the handle or bolster D by means of a screwpivot, g, as shownin Figs. 1 and 3, such guard being provided with a shoulder, Z, soformed as to allow the guard to be turned forward, and away from theedge of the knife, and into the position as shown in Figs. 1 and 2, thusenabling the knife to be readily ground or sharpened; but when the knifeis in the position as shown in Figs. 1 and 2, such shoulder rests firmlyon the top of the bolster, and thereby preserves the guard rigidly inposition while the knife is in use.

I do not claim, broadly, combining with the handle and blade of asole-edge-trimming knife a removable and adjustable guard to extendaround the point of the blade in order to prevent the latter fromnicking or cutting the upper while trimming the sole, as I am aware thatsuch is not new.

What I claim as my invention is- 1. In a sole-edgetrimming knife,substantially as described, the guard (J,- in combination with the bladeA and handle B, when the guard is formed with the shoulder Z, andpivoted to the handle, in manner as and for the purpose specified.

2. The combination, with the bolster D and.

the bar or jaw F, of the wedge G, provided with the two inclines b and0, and the clamping-screw H, as and for the purpose set forth. Intestimony that I claim the foregoing as my own invention I affix mysignature in presence'of two witnesses.

MERRILL A. TYLER.

' Witnesses:

F. P. HALE, F. O. HALE.

